Closure for containers



Dec. 24, 1929. J, H, GRUVER 1,741,108

CLOSURE FOR CONTAINERS Filed Aug. 10,' 192e vvvenkoz Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE CLOSURE FOR CONTAINERS Application filed August 10, 1928. Serial No. 298,717.

This invention relates to improvements in closures for containers.

More particularly the invention relates to closures for bottles or other containers in which a quickly applicable and removable, effective, water tight closure is a requisite.

An obj ect of the invention is to provide such a closure, in which but a very short smple turning movement is necessary to effect the closure or to break the same.

Another obj ect is to provide a cap, in the application of which to the neck of the bottle or other container, no care or observation whatsoever need be exercised by the operator,

it being suflicient to merely place the cap in contact with the neck of the bottle and to turn the cap relative to the bottle, it being bound to be drawn into water-tight contact with the neck.

A further object is to provide means whereby no movement other than the short rotary movement and no force other than the turning force of the cap relative to the bottle when the cap is placed in contact with the bottle mouth, is necessary to effect the closure.

Other objects will appear hereinafter.

The invention consists in the features, combination and arrangement of parts hereinafter described and particularly pointed out in the claims.

In the drawings Fig. 1 is a bottom plan view of my cap showing the inwardly disposed pitchless flange interrupted at one point only.

Fig. 2 is an elevation of the same.

Fig. 3 is a top plan view of the cap, showing the two part construction of the body consisting of the collar portion having a disc engaging flange and the disc cover portion, the washer or cork being inserted within the cap against the disc.

Fig. 4 is a top plan of the bottle neck with its pitchless flange or bead interrupted at one Y point only.

Fig. 5 is an elevation of the same. Referring to the drawings, I represents the cap or closure member having at its lower edge an inwardly disposed pitchless flange 2 interrupted at one point only, as shown at 3,

providing a single interruption, gate, or fiangeless portion.

The cap body may be of the ordinary one piece construction, but in the embodimentshown, the body comprises the collar portion 4 having upper inturned disc engaging flange 5 and the cover disc 6 embraced by the collar and disposed beneath the flange. Tasher 7 is in contact with the disc and disposed beneath the same. The disc and washer are loosely embraced within the cap and retained therein by the upper flange 5 and lower flange 2, but are adapted upon application of the cap to the bottle neck 8 in effecting the closure to be tightly held against the mouth of the bottle by the flange 5.

The bottle neck 8 is provided with a single pitchless thread 9 interrupted at one point only to form a gate as shown at 10 and having inclined cam surfaces 11 and 12 formed on its ends 13 and 14, the cam surface 11 .being formed on the under side of the end 13 of the pitchless thread 9 and the cam surface 12 being'formed on t-he upper side of the end 14C of the pitchless thread 9. 75 The pitchless thread 9 is provided with fine corrugations 15 molded on the under or flat side 16 thereof,'said corrugations extending radially of the bottle neck. The side 17 and pitchless flange 2 of the cap are provided 80 with a corresponding set of like corruga-tions vor rolled knurl surface 18, the rolled knurl on the inner side of the pitchless flange 2 being adapted to contact and frictionally lock with the corrugations on the underside of the pitchless thread 9 on the bottle.

The rolled knurl is formed on the side 17 and flange 2 and extend across the side 17 and then radially inwardly on the flange 2 to the edge thereof.

In applying the cap to the bottle neck, no particular care need be exercised, all that is necessary to be done is to place the cap in contact with the bottle neck and turn it relatively thereto and the cooperating interrupted pitchless flange and thread will operate to draw the cap into tight engagement on the bottle neck, and the cooperating corrugations will interengage to securely lock the closure against accidental turning. The cap by reason of the corrugated interlock, can only be removed by exerting a little harder force when turning the cap to remove the same.

The screw Cap used heretofore becomes loose in transit, due to rough treatment and the cooperating corrugations on the interengaging pitchless flange and thread of my invention obviate this difficulty.

The pitchless interlockof my invention employs some of the features of the ordinary pitched thread connection andthe bayonet joint connection, but is distinguished from such structures by its simplicity and readiness of manufacture, and provides a single pitchless flange on the cap interrupted at one point only and Cooperating with a single pitchless thread on the bottle interrupted at one point only and provided with relatively short inclined cam surfaces on its ends at the interruption.

While I have described a two piece construction of cap comprising the collar and disc, it will be understood that I do not limit the invention thereto, and that the ordinary one piece cap may be used, in which the top is integral with the depending walls.

Also it will be understood that the rolled knurl 0r corrugations may be omitted from the sides 17 of the cap, though when provided, they provide for ready manipulation of the cap.

' It will be apparent that the closure may be made either in the form of a one-piece cap or a two-piece cap comprising the collar or ring fastener and disc as described, allV within the scope of the invention.

The cooperating flange on the closure member and rib on the container with their single interruptions ashereinbefore stated will cooperate to draw the cap into tight engagement on the container. The cap or closure member when applied to the container will assume an angular position such that the right hand end of the flange 2 as shown in Fig. 2 will engage beneath the left hand end of the pitchless thread 8 at the cam surface 11 thereof, as shown in Fig. 5. rThe left hand end of flange 2 then rests on top of rib 9.

VTurning movement of the cap relative to the container in a clockwise direction will carry the cap around the rib with the said end of the flange at the right side of the gap or interruption in Fig. 2 moving beneath rib 9 andl the other end of the flange at the left side of the gap riding on top of the rib 9. Y

This movement is contined until the said end of the cap flange at the left side of the interruption rides down the cam incline l2,

which completes the application of the cap to the container. n

It will be readily apparent that a nice adjustment and proportioning of the extent of the substantially pitchless flange 2 on the closure with respect to the rib or pitchless thread and the exact angle of the cam inclines will result in any desired degree of tightness with which the cap is secured to theA containerand that the camming action permits of a very tight though readily removable connection.

In removing the-cap, it is turned counterclockwise in the embodiment shown so that the left end of the flange (Fig. 2), will ride up cam incline l2, while the right end of the flange will ride beneath kthe rib 9, thus reversing the whole movement until the cap comes loose, which it may do before a full revolution is completed.

Both ends of the flange defining the sides of the gap or interruption in the cap may be said to pass through the gap or interruption within a single revolution of the cap in applying the cap to the bottle.

I claim:

l. In combination in a closure for containers, a closure member having an inwardly disposed pitchless flange at its lower end, said flange being interrupted at one point only, and the neck of the container having a single pitchless thread thereon interrupted at one point only and having relatively short inclined cam surfaces on its ends at the interruption, said pitchless flange and thread being adapted to cooperate Vwhen the closure member is turned whileV in contact with the neck to effect the closure.

2. In combination in a closure for containers, a closure member of circular form having a side wall portion'depending from its top and a single pitchless flange extending inwardly from the lower end of the side wall portion, said flange being of continuous circular form interrupted at one point only, and the circular neck of the container having a single pitchless thread thereon interrupted at one point only and having relatively short inclined cam surfaces, one on each of its ends at the interruption, one of said cam inclines being on the lower side of the pitchless thread and causing the thread to taper upwardly at that end, the other of said cam inclines being on the upper side of the pitchless thread and causing the thread to taperdownwardly atfthat end, thus forming a gate in the pitchless thread having substantially parallel inclined walls.

3. Apparatus according to claim l in which said closuremember is provided with a rolled knurl forming corrugationsY on its side wall and lower flange, the corrugations extending vertically across the side wall and radially of the lower flange to itslinner edge.

Il. Apparatus according to claim 1 in which said pitchless flange and pitchless thread are provided with cooperating radially disposed corrugations to provide a lock against accidental displacement.

5. Apparatus according to claim l in which said pitohless flange on the closure member is provided on its inner, upper face with radially disposed corrugations, said pitohless thread n the container neck being provided on its lower face with radially disposed Corrugations adapted to cooperate with the first mentioned eorrugations to provide a closure looked against accidental opening.

6. A closure member for containers having an inwardly disposed pitchless iange at its lower end, said flange being of continuous circular form interrupted at one point only.

7. In combination in a closure for containers, a Closure member having an inwardly disposed pitchless flange at its lower end, said 'flange being of Continuous circular form, in-

terrupted at one point only and a container having on its neck a single pitohless thread interrupted at one point only and adapted to cooperate with the flange of the Closure member to effect the Closure.

In testimony whereof, I ailix my signature.

JOSEPH HARRY GRUVER. 

